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Dramatic niche shifts and morphological change in two insular bird species
Colonizations of islands are often associated with rapid morphological divergence. We present two previously unrecognized cases of dramatic morphological change and niche shifts in connection with colonization of tropical forest-covered islands. These evolutionary changes have concealed the fact tha...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448822/ https://www.ncbi.nlm.nih.gov/pubmed/26064613 http://dx.doi.org/10.1098/rsos.140364 |
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author | Alström, Per Jønsson, Knud A. Fjeldså, Jon Ödeen, Anders Ericson, Per G. P. Irestedt, Martin |
author_facet | Alström, Per Jønsson, Knud A. Fjeldså, Jon Ödeen, Anders Ericson, Per G. P. Irestedt, Martin |
author_sort | Alström, Per |
collection | PubMed |
description | Colonizations of islands are often associated with rapid morphological divergence. We present two previously unrecognized cases of dramatic morphological change and niche shifts in connection with colonization of tropical forest-covered islands. These evolutionary changes have concealed the fact that the passerine birds madanga, Madanga ruficollis, from Buru, Indonesia, and São Tomé shorttail, Amaurocichla bocagii, from São Tomé, Gulf of Guinea, are forest-adapted members of the family Motacillidae (pipits and wagtails). We show that Madanga has diverged mainly in plumage, which may be the result of selection for improved camouflage in its new arboreal niche, while selection pressures for other morphological changes have probably been weak owing to preadaptations for the novel niche. By contrast, we suggest that Amaurocichla's niche change has led to divergence in both structure and plumage. |
format | Online Article Text |
id | pubmed-4448822 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-44488222015-06-10 Dramatic niche shifts and morphological change in two insular bird species Alström, Per Jønsson, Knud A. Fjeldså, Jon Ödeen, Anders Ericson, Per G. P. Irestedt, Martin R Soc Open Sci Biology (Whole Organism) Colonizations of islands are often associated with rapid morphological divergence. We present two previously unrecognized cases of dramatic morphological change and niche shifts in connection with colonization of tropical forest-covered islands. These evolutionary changes have concealed the fact that the passerine birds madanga, Madanga ruficollis, from Buru, Indonesia, and São Tomé shorttail, Amaurocichla bocagii, from São Tomé, Gulf of Guinea, are forest-adapted members of the family Motacillidae (pipits and wagtails). We show that Madanga has diverged mainly in plumage, which may be the result of selection for improved camouflage in its new arboreal niche, while selection pressures for other morphological changes have probably been weak owing to preadaptations for the novel niche. By contrast, we suggest that Amaurocichla's niche change has led to divergence in both structure and plumage. The Royal Society Publishing 2015-03-04 /pmc/articles/PMC4448822/ /pubmed/26064613 http://dx.doi.org/10.1098/rsos.140364 Text en © 2015 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Biology (Whole Organism) Alström, Per Jønsson, Knud A. Fjeldså, Jon Ödeen, Anders Ericson, Per G. P. Irestedt, Martin Dramatic niche shifts and morphological change in two insular bird species |
title | Dramatic niche shifts and morphological change in two insular bird species |
title_full | Dramatic niche shifts and morphological change in two insular bird species |
title_fullStr | Dramatic niche shifts and morphological change in two insular bird species |
title_full_unstemmed | Dramatic niche shifts and morphological change in two insular bird species |
title_short | Dramatic niche shifts and morphological change in two insular bird species |
title_sort | dramatic niche shifts and morphological change in two insular bird species |
topic | Biology (Whole Organism) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448822/ https://www.ncbi.nlm.nih.gov/pubmed/26064613 http://dx.doi.org/10.1098/rsos.140364 |
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